package com.gw.interceptor;

import com.gw.context.BaseContext;
import com.gw.utils.JwtUtil;
import com.gw.properties.JwtProperties;
import io.jsonwebtoken.Claims;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

/**
 * jwt令牌拦截器
 */
@Component
@Slf4j
public class JwtTokenUserInterceptor implements HandlerInterceptor {

    @Autowired
    private JwtProperties jwtProperties;


    public boolean preHandle(final HttpServletRequest request, final HttpServletResponse response, final Object handler) {
        //判断当前拦截的是controller方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //拦截的不是动态方法，直接放行
            return true;
        }

        //1，从请求头获取令牌
        String token = request.getHeader(jwtProperties.getUserTokenName());

        //2,校验令牌
        try {
            log.info("jwt校验:{}", token);
            Claims claims = JwtUtil.parseJWT(jwtProperties.getUserSecretKey(), token);
            Long userId = Long.valueOf(claims.get("userId").toString());
            Integer userRole = (Integer) claims.get("userRole");
            BaseContext.setCurrentUserId(userId);
            BaseContext.setCurrentUserRole(userRole);
            return true;
        } catch (Exception e) {
            //4,不通过，响应401
            response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
            return false;
        }
    }


}
